Carrier SINGLE PACKAGE ROOFTOP UNITS 48PG20-28 Installation And Service Instructions Manual page 36

Table 22 — Fan Performance — 48PGF28 — Horizontal Supply and Return Units
AIRFLOW
0.2
(Cfm)
Rpm
6,500 799
E
7,000 856
7,500 913
F
8,000 971
8,500 1029
9,000 G 1087
9,500 1145
10,000 1203
H
10,500 1261
11,000 1320
11,500 1378
12,000 —
12,500 —
AIRFLOW
1.2
(Cfm)
Rpm
6,500 F 1005
7,000 1041
7,500 1080
G
8,000 1122
8,500 1167
9,000 1214
H
9,500 1262
10,000 1312
10,500 1363
11,000 —
11,500 —
12,000 —
12,500 —
LEGEND
Bhp — Brake Horsepower Input to Fan
Boldface indicates field-supplied motor/drive required.
NOTES:
1. Motor drive ranges:
(E) Low Range: 687-873 rpm, 5.75 bhp
(F) Mid-Low Range: 805-1007 rpm, 5.75 bhp
(G) Mid-High Range: 941-1176 rpm, 8.63 bhp
(H) High Range: 1014-1297 rpm, 11.50 bhp
All other rpms require field-supplied motor or drive.
2. See below for general fan performance notes.
1. Static pressure losses (i.e., economizer, electric heat, etc.) must be added
to external static pressure before entering Fan Performance table.
2. Interpolation is permissible. Do not extrapolate.
3. Fan performance is based on wet coils, clean filters, and casing losses.
See Accessory/FIOP Static Pressure information on page 39.
4. Extensive motor and drive testing on these units ensures that the full
horsepower range of the motor can be utilized with confidence. Using the
fan motors up to the bhp rating shown will not result in nuisance tripping or
premature motor failure. Unit warranty will not be affected.
AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)
0.4
Bhp Rpm Bhp
2.58 833 2.79
E
3.19 887 3.41
3.89 941 4.12
F
4.69 996 4.93
5.60 1052 5.85
6.62 1108 6.87
G
7.75 1165 8.02
9.01 1222 9.29
H
10.40 1279 10.69
11.93 1337 12.23
13.61 — —
— — —
— — —
AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)
1.4
Bhp Rpm Bhp
4.12 1052 4.57
4.72 1084 5.16
G
5.43 1119 5.86
6.24 1158 6.66
7.16 1200 7.58
8.21 1244 8.62
H
9.37 1290 9.78
10.66 1338 11.08
12.09 1387 12.51
— — —
— — —
— — —
— — —
GENERAL NOTES FOR FAN PERFORMANCE DATA TABLES
0.6
Rpm Bhp Rpm
872 3.05 914
E
921 3.67 958
F
F
972 4.39 1006
1024 5.20 1055
1078 6.12 G 1106
G
1132 7.16 1158
1187 8.31 1211
H
H
1243 9.59 1265
1299 11.00 1319
1355 12.55 1374
— — —
— — —
— — —
1.6
Rpm Bhp Rpm
1100 5.06 1148
G
1128 5.64 1172
G
1160 6.33 1201
1195 7.13 1233
H
1234 8.04 1269
H
1275 9.07 1308
1319 10.23 1349
1365 11.52 1392
— — —
— — —
— — —
— — —
— — —
5. Use of a field-supplied motor may affect wire size. Recalculate the unit
power supply MCA and MOCP if required. Contact the local Carrier repre-
sentative for details.
6. Use the following formula to calculate Input Watts:
Input Watts = Bhp x (746/motor eff.)
36
0.8 1.0
Bhp Rpm
3.36 958
F
3.98 999
4.69 1042
5.51 G 1088
6.44 1136
7.47 1185
8.63 1236
H
9.92 1288 10.28
11.34 1341 11.70
12.89 1394 13.26
— —
— —
— —
1.8 2.0
Bhp Rpm
5.60 1195
6.17 1217
H
6.84 1242
7.63 1272
8.53 1304
9.56 1340 10.08
10.71 1379 11.23
12.00 —
— —
— —
— —
— —
— —
Bhp
3.71
4.33
5.04
5.86
6.78
7.82
8.99
—
—
—
Bhp
6.17
6.74
7.40
8.17
9.06
—
—
—
—
—
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